Effect of muscle strength at different intensities on resting energy expenditure

Abstract

Introduction: the regular practice of physical exercise is an important modulator of resting energy expenditure (REE), which depending on the intensity, duration, and type of exercise can increase the REE in an acute manner as well as long term. The effects of dynamic muscular strength exercises on the REE have been treated very little in literature. Objective: compare the effect of muscle strength exercise (MSE) at different intensities on the REE in young males. Methods: Intra-group design. Fourteen subjects aged 22,5±1,5 <active (IPAQ= MET≥3000 week), realized two sessions of strength exercises at 2 intensities (40% and 80%RM), in 3 types of exercises (90° Squats; Bicep Curls, and Upright Row). Each session evaluated the same number of sets (3), repetitions (6), and rest time between sets (2min.). The REE was measured beforehand, immediately after, and 24 hours after by indirect calorimetry. Results: The REEpost (kcal/day) increased after the MSE at 40%RM, (p<0,05; CI=1950,67-2215,62) and at 80%RM, (p<0,001; CI=1947,10-2154,62), for a high and moderate effect size respectively. Differences in the % of change for both intensities (p<0,05) and a high effect size for 40%RM and moderate for 80%RM were found. No differences were found in the comparison (kcal/day) between REEpre y REEpost 24h (p>0,05) after the exercise at 40%RM. The REEpost 24h was maintained according to the REEpre when the intensity was 80%RM. Conclusion: The REEpost exercise is independent of the intensity of the exercise and only is maintained after 24 hours when

Test–Retest Reliability of Functional Electromechanical Dynamometer on Five Sit-to-Stand Measures in Healthy Young Adults

“…The reliability of the tests used to assess physical fitness is influenced by the biological differences of the participants [ 49 ] and by of the variations that may occur in the instrument used to obtain the data [ 44 ]. In this sense, statistical analyses reported in some studies indicate that the reliability of the instruments is assured with an ICC value above 90% between two or more evaluations [ 44 ], while differences between participants can be reduced by including a familiarization period before data collection [ 29 , 36 ]. Therefore, the reliability achieved in the present study after multiple repetitions is due to two fundamental reasons: the accuracy of the FEMD used [ 30 , 32 ], and, on the other hand, the familiarization process that the participants had before data collection.…”

“…Currently, the development of the functional electromechanical dynamometer (FEMD) (as opposed to the angular isokinetic devices) [ 28 ] allows systematizing and controlling multiple components of the load during the performance of natural movements, such as the range and velocity of movement, magnitude of resistance, control of strength exercised and type of muscle contraction (isometric, concentric and eccentric). In this regard, studies have assessed the reliability and validity [ 29 , 30 , 31 , 32 ] and used the FEMD [ 33 , 34 , 35 , 36 , 37 , 38 ] under different experimental modalities and muscle groups. However, studies that propose to assess the reliability of the STS test using this type of technology have not been previously developed.…”

A qualitative scale of the 6-minute race test to evaluate maximum aerobic speed in physically active people from 18 to 25 years

“…Thus, the statistical analyses reported in some studies show that the instruments' reliability is assured with an ICC value of over 90% between two or more evaluations 34) . Simultaneously, the differences between participants can be reduced with a period of familiarization with the test before data collection 35,36) . Thus, the reliability achieved in the present study is due to two fundamental reasons: On the one hand, the accuracy of the 6MRT min for estimating VO2max and MAS as opposed to other field tests 4) ; and, on the other, the familiarization process that the participants underwent before data collection 35,36) .…”

“…Simultaneously, the differences between participants can be reduced with a period of familiarization with the test before data collection 35,36) . Thus, the reliability achieved in the present study is due to two fundamental reasons: On the one hand, the accuracy of the 6MRT min for estimating VO2max and MAS as opposed to other field tests 4) ; and, on the other, the familiarization process that the participants underwent before data collection 35,36) . Thus, it is essential that when replicating this protocol, participants have at least two familiarization sessions with the 6MRT.…”